13245309538865 has 12 divisors (see below), whose sum is σ = 16461352597404. Its totient is φ = 10230859778496.

The previous prime is 13245309538847. The next prime is 13245309538891. The reversal of 13245309538865 is 56883590354231.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 31851897841 + 13213457641024 = 178471^2 + 3635032^2 .

It is not a de Polignac number, because 13245309538865 - 2²⁰ = 13245308490289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13245309538798 and 13245309538807.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1574943422 + ... + 1574951831.

It is an arithmetic number, because the mean of its divisors is an integer number (1371779383117).

Almost surely, 2^{13245309538865} is an apocalyptic number.

It is an amenable number.

13245309538865 is a deficient number, since it is larger than the sum of its proper divisors (3216043058539).

13245309538865 is an equidigital number, since it uses as much as digits as its factorization.

13245309538865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149895316 (or 3149895287 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 62.

The spelling of 13245309538865 in words is "thirteen trillion, two hundred forty-five billion, three hundred nine million, five hundred thirty-eight thousand, eight hundred sixty-five".